Hi, I'm converting my Blu-ray collection to digital and in the process of trying to shrink these 30GB movies down to 4GB or less I keep getting particles outlining the people in the movies. I have my settings set at MKV, X265 10bit, with constant quality set to 22, speed set to slow, and constant frame rate.
I've used HandBreak, Vid Coder, MyFFmpeg, etc.
[Attachment 83415 - Click to enlarge]
+ Reply to Thread
Results 1 to 14 of 14
-
-
Original vs converted.
[Attachment 83416 - Click to enlarge]
[Attachment 83417 - Click to enlarge] -
This screenshot really shows how bad it is.
[Attachment 83419 - Click to enlarge] -
Compression and re-encoding artifacts. One cannot expect same quality by shrinking the filesize by a factor of 1/8. You need to find your sweet spot between encoder, filesize (bitrate), frame resolution, noise filtering etc.
-
Buy a larger drive and leave the video as they are
-
-
-
The source has a lot of film grain. A lot of the compression of high compression codecs comes from not repeating parts of the picture that don't change from frame to frame. Film grain changes with every frame so it doesn't compress well. What you want to do is filter away the grain before compression.
Another thing you can do is reduce the resolution. Fewer pixels requires less bitrate. But you loose a little detail too.
It's all a matter of where you want to make your compromises. -
Ah, that makes a lot of sense. I did notice that this film had a lot more film grain than the other films I converted which were about the same size after being ripped but I was able to get them down to the size I wanted while keeping great quality. I'll make those changes right away!
-
With constant quality encoding the encoder uses whatever bitrate is required to achieve the specified quality. You don't know what bitrate that will be beforehand. If you need a specific file size you want to use bitrate based encoding. Bitrate is defined as:
Code:bitrate = stream size / running time
Code:bitrate = file size / running time
Code:bitrate = file size / running time bitrate = 4,000,000,000 bytes * 8 (bits per byte) / 7200 seconds bitrate = 32,000,000,000 bits / 7200 seconds bitrate = 4,444,444 bits per second birate ~= 4,444 kbit/sec
-
What setting do I pick to remove the grain?
[Attachment 83508 - Click to enlarge]
[Attachment 83507 - Click to enlarge]
Similar Threads
-
Conversion 4:3 to 16:9
By Jaglo in forum Video ConversionReplies: 350Last Post: 13th Aug 2024, 03:25 -
DVD Subtitles IDX/SUB Always Black Text with Black Outline in VIDEO_TS
By larrygrobertson in forum Authoring (DVD)Replies: 2Last Post: 23rd May 2022, 12:02 -
4:2:2 to 4:2:0 conversion?
By meimeiriver in forum Video ConversionReplies: 1Last Post: 1st Feb 2022, 23:26 -
BorisFX particle Illusion 2020 Standalone now free!
By Brainiac in forum Latest Video NewsReplies: 1Last Post: 20th Oct 2020, 10:16 -
Help with particle effects and volumetric lighting.
By TristanSynth in forum Newbie / General discussionsReplies: 2Last Post: 9th Mar 2020, 21:06